Patent US3811444A successfully refreshed from Google Patents.
US2739092A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of reinforced paper and product
Assignee: American Sisalkraft Corp
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Filing: 1952-01-14
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Granted: 1956-03-20
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Expires: 1972-01-14
Abstract
No abstract record available.
Inventors
- 👤 William N Stevenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:59
CPC Classifications
D; D21; D21H; D21H25/00; D21H25/005; D21H27/00; D21H27/30; D21H27/32; D21H27/34; D21H11/00; D21H11/02; D21H11/04; D21H11/12; D21H13/00; D21H13/10; D21H13/28; D21H13/34; D21H13/36; D21H13/38; D21H13/42; D21H15/00; D21H15/02; D21H15/06; D21H17/00; D21H17/63; D21H17/67; D21H21/00; D21H21/14; D21H21/16; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1061; Y10T428/00; Y10T428/23907; Y10T428/2395; Y10T428/31504; Y10T428/31971; Y10T428/31975; Y10T428/31978; Y10T428/31982; Y10T442/00; Y10T442/60; Y10T442/659
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
THE METHOD OF MANUFACTURING MULTIPLY PAPER WHICH INCLUDES THE STEPS OF COATING A PAPER WEB WITH ADHESIVE, DEPOSITING REEFORCING FILAMENTS ON THE ADHESIVE COATING, WINDING THE WEB INTO A TIGHT ROLL BEFORE THE ADHESIVE HAS HARDENED, SETTING UP THE ADHESIVE SO THAT ADJACENT PAPER WEB CONVOLUTIONS OF THE TIGHT ROLL ARE ADHERED TOGETHER, AND THEN UNWINDING THE ROLL WHILE SPLITTING THE PAPER WEB CONVOLUTIONS THEREON TO FORM A MULTIPLY REENFORCED SHEET HAVING SPLIT PAPER PLIES ON OPPOSITE SURFACES THEREOF.
Claim 2
Dependent Claim
83 words
AS AN ARTICLE OF MANUFACTURE, A LAMINATE OF TWO PLIES OF PAPER SECURED TOGETHER BY A LAYER OF ADHESIVE IN WHICH REINFORCING FILAMENTS ARE DEPOSITED, THE INNER AND OUTER SURFACES OF EACH ONE OF THE PAPER PLIES BEING DISSIMILAR IN THAT THE INNER SURFACE OF EACH PLY, CONTIGUOUS TO THE ADHESIVE, IS CALENDERED, AND THE OUTER EXPOSED SURFACE OF EACH PLY, REMOLE FROM THE ADHESIVE, IS UNCALENDERED AND PRESENTS A TORN-FIBER SURFACE EXPOSING INTERNAL PAPER FIBERS ON EACH OUTER SURFACE OF THE LAIMINATE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-20 | 1959-09-19 | 1960-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-20 | 1963-09-19 | 1964-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-20 | 1967-09-19 | 1968-03-20 | $7700.00 | Window Closed / Lapsed |